Qualcomm TEE (QTEE) hosts Trusted Applications (TAs) and services in
the secure world, accessed via objects. A QTEE client can invoke these
objects to request services. Similarly, QTEE can request services from
the nonsecure world using objects exported to the secure world.
This introduces low-level primitives to facilitate the invocation of
objects hosted in QTEE, as well as those hosted in the nonsecure world.
Signed-off-by: Amirreza Zarrabi <quic_azarrabi@xxxxxxxxxxx>
---
drivers/firmware/qcom/qcom_scm.c | 60 ++++++++++++++++++++++++++++++++++
drivers/firmware/qcom/qcom_scm.h | 7 ++++
include/linux/firmware/qcom/qcom_scm.h | 9 +++++
3 files changed, 76 insertions(+)
diff --git a/drivers/firmware/qcom/qcom_scm.c b/drivers/firmware/qcom/qcom_scm.c
index 72bf87ddcd96..8ac570df192b 100644
--- a/drivers/firmware/qcom/qcom_scm.c
+++ b/drivers/firmware/qcom/qcom_scm.c
@@ -1862,6 +1862,66 @@ static int qcom_scm_qseecom_init(struct qcom_scm *scm)
#endif /* CONFIG_QCOM_QSEECOM */
+#ifdef CONFIG_QCOMTEE
+
+int qcom_scm_qtee_invoke_smc(u64 inbuf, u64 inbuf_size, u64 outbuf, u64 outbuf_size,
+ u64 *result, u64 *response_type, u64 *data)
+{
+ struct qcom_scm_desc desc = {
+ .svc = QCOM_SCM_SVC_SMCINVOKE,
+ .cmd = QCOM_SCM_SMCINVOKE_INVOKE,
+ .owner = ARM_SMCCC_OWNER_TRUSTED_OS,
+ .args[0] = inbuf,
+ .args[1] = inbuf_size,
+ .args[2] = outbuf,
+ .args[3] = outbuf_size,
+ .arginfo = QCOM_SCM_ARGS(4, QCOM_SCM_RW, QCOM_SCM_VAL, QCOM_SCM_RW, QCOM_SCM_VAL),
+ };
+ struct qcom_scm_res res;
+ int ret;
+
+ ret = qcom_scm_call(__scm->dev, &desc, &res);
+ if (ret)
+ return ret;
+
+ *response_type = res.result[0];
+ *result = res.result[1];
+ if (data)
+ *data = res.result[2];
+
+ return 0;
+}
+EXPORT_SYMBOL(qcom_scm_qtee_invoke_smc);
+
+int qcom_scm_qtee_callback_response(u64 buf, u64 buf_size, u64 *result, u64 *response_type,
+ u64 *data)
+{
+ struct qcom_scm_desc desc = {
+ .svc = QCOM_SCM_SVC_SMCINVOKE,
+ .cmd = QCOM_SCM_SMCINVOKE_CB_RSP,
+ .owner = ARM_SMCCC_OWNER_TRUSTED_OS,
+ .args[0] = buf,
+ .args[1] = buf_size,
+ .arginfo = QCOM_SCM_ARGS(2, QCOM_SCM_RW, QCOM_SCM_VAL),
+ };
+ struct qcom_scm_res res;
+ int ret;
+
+ ret = qcom_scm_call(__scm->dev, &desc, &res);
+ if (ret)
+ return ret;
+
+ *response_type = res.result[0];
+ *result = res.result[1];
+ if (data)
+ *data = res.result[2];
+
+ return 0;
+}
+EXPORT_SYMBOL(qcom_scm_qtee_callback_response);
+
+#endif /* CONFIG_QCOMTEE */
+
/**
* qcom_scm_is_available() - Checks if SCM is available
*/
diff --git a/drivers/firmware/qcom/qcom_scm.h b/drivers/firmware/qcom/qcom_scm.h
index e36b2f67607f..6b6bdee39236 100644
--- a/drivers/firmware/qcom/qcom_scm.h
+++ b/drivers/firmware/qcom/qcom_scm.h
@@ -148,6 +148,13 @@ struct qcom_tzmem_pool *qcom_scm_get_tzmem_pool(void);
#define QCOM_SCM_SVC_GPU 0x28
#define QCOM_SCM_SVC_GPU_INIT_REGS 0x01
+/* ARM_SMCCC_OWNER_TRUSTED_OS calls */
+
+#define QCOM_SCM_SVC_SMCINVOKE 0x06
+#define QCOM_SCM_SMCINVOKE_INVOKE_LEGACY 0x00
+#define QCOM_SCM_SMCINVOKE_CB_RSP 0x01
+#define QCOM_SCM_SMCINVOKE_INVOKE 0x02
+
/* common error codes */
#define QCOM_SCM_V2_EBUSY -12
#define QCOM_SCM_ENOMEM -5
diff --git a/include/linux/firmware/qcom/qcom_scm.h b/include/linux/firmware/qcom/qcom_scm.h
index 4621aec0328c..2e2a6abf9e34 100644
--- a/include/linux/firmware/qcom/qcom_scm.h
+++ b/include/linux/firmware/qcom/qcom_scm.h
@@ -168,4 +168,13 @@ static inline int qcom_scm_qseecom_app_send(u32 app_id,
#endif /* CONFIG_QCOM_QSEECOM */
+#ifdef CONFIG_QCOMTEE
+
+int qcom_scm_qtee_invoke_smc(u64 inbuf, u64 inbuf_size, u64 outbuf, u64 outbuf_size,
+ u64 *result, u64 *response_type, u64 *data);
+int qcom_scm_qtee_callback_response(u64 buf, u64 buf_size, u64 *result, u64 *response_type,
+ u64 *data);
+
+#endif /* CONFIG_QCOMTEE */
+
#endif
--
2.34.1
